Screen-printed electrodes (SPE) with carboxyl-functionalized single-walled carbon nanotubes (DRP-110SWCNT) as working electrode (d = 4 mm) were purchased from Dropsens (Llanera, Spain). The counter and reference electrode on the sensor strip are made of carbon and silver, respectively. All potentials are given vs. the reference electrode on the sensor strip. For electrochemical experiments, a PalmSens3 potentiostat/galvanostat with the appropriate Software PSTrace 5.1 was obtained from PalmSens (Houten, The Netherlands).
Palmsens3 potentiostat galvanostat
Manufactured by PalmSens
The PalmSens3 is a potentiostat/galvanostat device designed for electrochemical measurements. It provides precise control and measurement of electrochemical parameters, enabling users to perform a variety of electrochemical techniques.
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2 protocols using palmsens3 potentiostat galvanostat
1
Electrochemical analysis using SPE
2
Electrochemical and HPLC Analysis of Sudan 1
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Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurements were carried out with a PalmSens3 potentiostat/galvanostat (PalmSens BV, Houten, The Netherlands) and CHI 660B (CH Instruments, Inc., Austin, TX, USA). A conventional three-electrode system, consisting of glassy carbon working electrode (MF-2012, 3.0 mm diameter; BASi, West Lafayette, IN, USA), Ag/AgCl reference electrode (MF- -2052; BASi) and platinum wire auxiliary electrode (MW-1032; BASi), was used. Moreover, Agilent 1200 series HPLC system (Agilent Technologies, Inc., Santa Clara, CA, USA) was used for Sudan 1 chromatographic analysis on the ACE C18 (250 mm×4.6 mm) column (Advanced Chromatography Technologies Ltd, Aberdeen, UK), with a mobile phase consisting of methanol/acetonitrile (40:60, by volume) and a constant flow rate of 0.5 mL/min. The injection volume was 10 μL and the column temperature was set at 25 °C. Finally, the wavelength was set at 254 nm for quantitative analysis.
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